能源草新品系桂能草1号特征特性及高产栽培技术研究

能源草新品系桂能草1号是广西农业科学院经济作物研究所从国外引进的杂交狼尾草资源中经过多年选育出的能源专用型新品系.该品系和传统的牧草相比,生物产量和纤维素含量高;一年两收,一茬生育期约为150 d,适应性广,生长快,再生性强,抗逆性强;品比试验表明,其年干物质产量平均达到77.93 t/hm2,生物产量生产潜力巨大;经广西分析测试中心分析测定,干物率为36.3％,纤维素含量为57.0％,半纤维素含量为7.44％,热值高高达18.49 MJ/kg,灰分2.84％.桂能草1号新品系在南方大部分地区种植良好,由于既可以转化为乙醇,又可以制成固体燃料代替煤,所以有望成为我国南方优良的能源型纤维类草本作物.主要分析新品系桂能草1号的生物学特征,总结其高产栽培技术,为该品系发展生物质能源提供技术支持.

Study on Characteristics of New Energy Grasses Strains Guinengcao 1 and Its High-yielding Cultural Techniques

A new energy grasses strain Guinengcao 1 has been screened for many years from germplasm resources of Hybrid Pennisetum introduced from abroad by our research team.The new strain with higher biological yield and higher cellulose content compared with other grasses could harvest two crops a year that each crop need 150 day.In addition,this strain had extensive adaptability,strong regeneration,resists the going against strong,etc.As a result of the trial and the characters analysis and identification,the average yield of dry matter was 77.93 t/（hm2 · a）,the dry matter content was 36.3 %,the cellulose content was 57.0 %,the hemicellulose content was 7.44 %,the heat value was 18.49 MJ/kg,the ash content was only 2.84 %.This strain was perennial grasses for energy with the characteristics of both transformed for ethanol and made into solid fuel instead of coal could plant in most parts of South China.So,characteristics of this new energy grasses strains and its high-yielding cultural techniques were summarized,which will provide technical support for development of bioenergy.